<template>
    <el-container>
        <el-header>
            <div>
                <img src="../assets/logo.png">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="primary" @click="logout">退出</el-button>
        </el-header>
        <el-container>
            <el-aside :width="isCollapse ? '64px' : '200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <el-menu unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
                    <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
                        <template slot="title">
                            <i :class="iconsObj[item.id]"></i>
                            <span>{{item.authName}}</span>
                        </template>
                        <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
                            <template slot="title">
                                <i class="el-icon-menu"></i>
                                <span>{{subItem.authName}}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <el-main>
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
export default {
    data () {
        return {
            menulist: [],
            iconsObj: {
                125: 'iconfont icon-user',
                103: 'iconfont icon-tijikongjian',
                101: 'iconfont icon-shangpin',
                102: 'iconfont icon-danju',
                145: 'iconfont icon-baobiao'
            },
            isCollapse: false,
            activePath: ''
        }
    },
    created () {
        this.getMenuList()
        this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods: {
        logout () {
            window.sessionStorage.clear()
            this.$router.push('/login')
        },
        async getMenuList () {
            const { data: res } = await this.$http.get('menus')
            if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
            this.menulist = res.data
        },
        toggleCollapse () {
            this.isCollapse = !this.isCollapse
        },
        saveNavState (activePath) {
            window.sessionStorage.setItem('activePath', activePath)
            this.activePath = activePath
        }
    }
}
</script>

<style lang="less" scoped>
    .el-container {
        height: 100%;
        width: 100%;
    }

    .el-header {
        background-color: #409EFF;
        display: flex;
        justify-content: space-between;
        padding-left: 0;
        align-items: center;
        color: #000;
        font-size: 30px;
        font-weight: bold;
        font-family: '宋体';
        > div {
            display: flex;
            align-items: center;
            img {
                height: 60px;
                width: 60px;
            }
            span {
                margin-left: 15px;
            }
        }
    }

    .el-main {
        background-color: #E4E7ED;
    }

    .el-aside {
        .el-menu {
            border-right: none;
        }
    }

    .iconfont {
        margin-right: 10px;
    }

    .toggle-button {
        font-size: 10px;
        line-height: 24px;
        color: #000;
        text-align: center;
        letter-spacing: 0.2em;
        background-color: #00ccffe0;
        cursor: pointer;
    }
</style>
